The company said it would combine with Nasdaq-listed Capitol Acquisition Corp II in a deal worth $439m.
Capitol was formed for the merger and raised $200m when it went public in May 2013.
It will acquire Lindblad's shares and the combined business will be listed on the Nasdaq exchange and called Lindblad Expeditions Holdings.
Sven-Olof Lindblad, founder and president of Lindblad, will remain in place and own 29% of the company.
